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P1540 Diagnostic Trouble Code Discussion for December 2004

Air Conditioning Refrigerant Over-Pressure - Air Conditioning Disabled

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Trouble Ticket Help Requests for DTC P1540
Help Request Posted
1999 Mazda Millenia S 2.3L MIL Lamp on VIN: JM1TA2227X
P1540: Air Bypass Valve System. ... will intermittently code p1540 air by-pass system - open or short circuit. When this happens sometimes it will also light up TCS light and trans will go into limp mode. I have inspected vacum hoses til I can't see straight also checked the resistance of by...
December 01, 2004